Stand By, Boys! by K. Norel
published 1955

The true story of when the waves of the North Sea broke through the dikes and flooded much of Zeeland (a province of the Netherlands) on February 1, 1953, and how the boys and girls, as well as the men and women, struggled bravely to save their land and to help each other.

This is a good read-aloud, and you can even buy the audio version here.